In portrait there is no side menu, and perhaps its better that way on a narrow screen, as its easy to return to the dashboard.
The dashboard in portrait has the lozenges, while in landscape they are large bars across the screen.
My experience today (17/11/21) on macOS big sur was good. The Snakeoil tweaks section and sub-sections is well laid out, with access to the save button without scrolling. I like the new layout on Mac.
The landscape icons on dashboard are very large on landscape phone screen two across only, and on Mac they fill the screen.